Top answers

Biology
All levels

How is body temperature regulated in mammals?

When it’s too hot, vasodilation occurs, in which the capillaries near the surface of the skin increase in diameter, allowing more blood to flow through them, releasing heat. Hairs on the skin lie flat. Th...

AL
Answered by Aylin L. Biology tutor
6619 Views

How is a leaf adapted for photosynthesis?

Leaves have a large surface area so more light hits them. The upper epidermis of the leaf is transparent, allowing light to enter the leaf. The palisade cells contain many chloroplasts which allow light t...

AL
Answered by Aylin L. Biology tutor
160636 Views

What is the Hardy-Weinberg equilibrium and when is it used? With an example

The Hardy-Weinberg equilibrium is used to work out dominant and recessive allele ratios in a population regarding one gene. Dominant alleles are those which when at all present in the genotype develops a ...

EB
Answered by Ellie B. Biology tutor
10596 Views

Which of the following are found in plant cells but not in animal cells? Mitochondria, Cell Wall, Cell membrane, Chloroplasts, Cytoplasm, Vacuole

The cell wall, chloroplasts and vacuole are found in plant cell rather than animal cells. These components are know as organells of a cell and these organells for a plant are vital for its functionality a...

TA
40433 Views

Explain how water is re-absorbed in the kidney

It would be helpful for you to have a diagram of a kidney nephron in front of you as you read this explanation. The body has a clever mechanism to conserve water levels, it creates a strong salt concentra...

CD
Answered by Charlotte D. Biology tutor
34538 Views

We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning